Steve Martin began visibly transitioning to grey hair around 1980-1981.

The Exact Timing and Context

This shift became noticeable as he entered his late 30s:

• Age 35-36: Significant greying became publicly apparent during this period (1980-1981).
• Early 1980s Look: By the time he starred in films like "Pennies from Heaven" (1981) and "Dead Men Don't Wear Plaid" (1982), his salt-and-pepper hair had become a defining feature.
• Rapid Change: The transition happened relatively quickly over a few years leading up to and within the early 1980s.

Factors Influencing the Change

• Genetics: Genetics play the primary role in when and how quickly hair loses pigment.
• Life Milestones & Stress: He was reaching the peak of his initial stand-up fame and transitioning heavily into film roles around this time.